Oil-retainer for barrels of firearms.



F. 1. MCGAVISK.

olL RETAINER FOR BARRELS oF FIRE/mms.

APPLICATION FILED OCT. 30,1916.

Patented June 12, 1917.

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FREDRICK J'. MCGAVISK, OF GRAND HAVEN, MIQHIGAN.

OIL-RETAINER FOR BARRELS 0F FIREARMS.

Specification of Letters Patent. Patented June 12, 1917.

Application filed October 30, 1916. Serial No. 128,567.

vention, such as will enable others skilled in `the art to which it appertains to make and use the same.

The prese-nt invention has for its object to provide a device of this character construc-ted iii such a manner that when applied to the barrel it Will-serve to retain a quantity of oil Within the barrel indefinitely so as to prevent rust accumulating Within the barrel.

A further object of the' invention is to provide a-device of this character so constructed that the device when in place Will positively retain the oil Within the barrel, but said device can be easily and quickly removed when desired.

A still further object of the invention is to provide a device of this character provided with means for absorbing the jar of the ring pin when the hammer is released.

' YWith these and other objects in view this invention resides in the novel features of construction, formation, combination and arrangement of parts to be hereinafter. more fully described and claimed in the accompanying drawing in Whieh:-

Figure 1 is a side elevation of a barrel partly in section showing the same equipped with the device.

F ig. -2 is a longitudinal sectional View through the retainer used in the breech end of the barrel.

Fig. 3 is an end view. of the retainer used on the muzzle ofthe barrel.

Fig. Li is a plan view of the muzzle retainei'.

Referring to the drawing 1 indicates the barrel of a gun, and in the breech end thereofis engaged the retainer 2, said retainer comprising a shell 3 which has its priming opening 4.- unobstructed so that when the hammer is released the firing pin thereof can enter the opening. stood that the device can be used with any type of firearm barrel. h

Engaged in the shell 3 with a coil spring the outer end of which has bearing therelt will be under` i against is a disk 5 which receives the impact of the liringpin when the hammer is released. The front end of the spring 4l is engaged with the disk (l, said disk being slidably mounted in the shell 3 and is provided With a central threaded opening 7 in which is engaged a threaded rod 8, said rod having its front end secured in the rubber plug 9, said plug being adapted to engage in the bore of the barrel 1 so as to retainv the oil in the barrel when the gun is resting in a position with the muzzle elevated. Removably engaged with the shell 3 isa`cap 10, so that access can be had to the interior thereof.

The retainer 11 for the muzzle of the barrel consists of a plate 12, said plate being substantially circular in shape' and has hingedly connected at diametrically opposite points plates 13 and 14, the former having a slot 15 formed therein for receiving the sight 1G carried by the barrel 1. Vhen the sight is engaged .with the slot 15 it is obvious that longitudinal movement of thc plat'e 13 relative to the barrel will be prevented, but the plate can be readily removed when desired.

The plate 14 lies under the barrel l, While the plate 13 engages the upper surface thereof, and at which time the packing 17 carried by tli'e plate 12 will close the muzzle of the barrel. The rear end of the plate 13 is provid'd With lateral wings 18 which are adapted to be bent around the barrel and have their free ends provided With 4hooks 19, the purpose of which will appeal' later.

The plate 14; has its rear end terminating in spaced fingers 20, and pivotally and adjustably` mounted between the lingers is a lever 21, said lever having connected to its inner end a` cross bar 22, said bar having its ends 23 adapted to detachably engage the hooks 19 0f the wings 18. Thus it will loe seen that When the hooks 19 are engaged with the ends 23, that the lever 21 can be swung rearwardly thereby swinging the plate 12 rearwardly vvith the result that the plate 12 Will bevlirmly engaged with the muzzle of the barrel so as to close the same to prevent oil contained in the barrel from leaking from the muzzle should the barrel be inverted.

Wvhat is claimed. is

1. An oil retainer for firearm barrels comprising a, shell removably' engaged in the breech of the barrel, a plug yieldably con- 20 5 2. An oil retainer for rearm barrels barrel, plates hingedly connected to said comprising a shell removably engaged in plate, means for detachably connecting the the breech of the barrel, said shell having plates to the barrel, and means removably its priming opening unobstructed, disks engaged with the breech end of the barrel, mounted in the shell, a coil spring disposed said means operating in conjunction with 25 10 between the disks, one of said disks being the plate to trap oil within the barrel.

disposed adjacent the priming opening7 a In testimony whereof, l affix my signa, rod threaded in the other disk, the outer ture, in the presence of two witnesses. endlof said rodl having a plug carried there- FREDRICK J. MCGAVISK. by for yieldably engaging the bore of the Witnesses: 15 barrel, the disk adjacent the priming 0pen`- GEORGE D. TURNER, ing serving to receive the impact of the HELEN B. REID.

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nected with the shell for engaging the bore of the barrel, and means removably engaged with the barrel for closing the muzzle thereof.

firing pin of the hammer, and means for closing the muzzle end of the barrel.

3. An oil retainer for gun barrels comprising a plate for closing the muzzle of the 

